28946129 has 4 divisors (see below), whose sum is σ = 28969584. Its totient is φ = 28922676.

The previous prime is 28946117. The next prime is 28946131. The reversal of 28946129 is 92164982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28946129 - 2¹² = 28942033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28946429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9767 + ... + 12380.

It is an arithmetic number, because the mean of its divisors is an integer number (7242396).

Almost surely, 2^28946129 is an apocalyptic number.

It is an amenable number.

28946129 is a deficient number, since it is larger than the sum of its proper divisors (23455).

28946129 is a wasteful number, since it uses less digits than its factorization.

28946129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23454.

The product of its digits is 62208, while the sum is 41.

The square root of 28946129 is about 5380.1606853327. The cubic root of 28946129 is about 307.0413246723.

The spelling of 28946129 in words is "twenty-eight million, nine hundred forty-six thousand, one hundred twenty-nine".